Do you have a paper that explains what your deposit was for?
When I ordered my car the salesman put all my information in the system and it generated a summary printout of the options, the option codes, and the pricing. We also estimated the trade in, how much I was planning on putting...
Just as an aside, using rebates to claim pricing lower than X-plan is incorrect. Rebates can be applied to the X-plan (A and Z plan also) pricing as well unless they are specifically restricted from doing so but I have not run into that yet.